Later Monday, world No. 1 Aussie Open champion and French and U.S. Open
runner-up Novak Djokovic will face seventh seed Jo-Wilfried Tsonga, who was
last year's Tour Finals runner-up to the great Roger Federer.

On Tuesday in London, the second-seeded reigning two-time Tour Finals champion
and former No. 1 Federer will battle eighth seed Janko Tipsarevic and last
week's Paris Masters titlist and former Tour Finals runner-up David Ferrer,
seeded fourth this week, will tangle with former runner-up and sixth seed Juan
Martin del Potro.

This week's four-player Group A features the 2008 champion Djokovic, Murray
(1-0), Berdych (0-1) and Tsonga, while Group B boasts the six-time winner and
former runner-up Federer, Ferrer, del Potro and Tipsarevic. The top-two
players from each group will play in the semifinals on Sunday, and the winners
will square off in the lucrative finale next Monday at The O2.

The 2012 World Tour Finals champion can earn as much as $1.76 million.